* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
em,
i {
  font-style: normal;
}
li {
  list-style: none;
}
img {
  border: 0;
  vertical-align: middle;
}
button {
  border: none;
  background: none;
  cursor: pointer;
}
